Dislocation-type safety lighter

ABSTRACT

A dislocation-type safety lighter the invention is disclosed. The dislocation-type safety lighter includes a main body, a wheel racket, a file wheel, a metal cap, and a lever. The lever includes a pressing part, a base, and a slipping hole. Each side of the base furnishes a salient part used to be the pivot point C of the lever. The salient parts are fitted in the securing holes near the bottom of the file-wheel seats, and the securing holes) are used as pivot seat for bearing the salient parts. The metal cap is capped on the top of the wheel racket to cover the file wheel and the lever. The height H between the elevation of the “point A” of exerting force P and the elevation of the pivot point C is in the range (⅓)H′*H*(⅔)H′ where the height H′ is equal to the diameter of the file wheel ( 3 ). The larger the height H, the more laborious it is to turn the file wheel ( 3 ) by the thumb of the user that makes the children whose exerting force is relatively weak harder to ignite the lighter. In this way, the lighter of the invention is capable of improving the efficacy of safety usage. Nevertheless, the exerting force P is still within the range of an adult user.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a dislocation-type safety lighter, and more particularly, to a dislocation-type safety lighter that increases the height of the pressing part making the user laborious rather than labor saving in exerting force to ignite the lighter to avoid the children in playing around the lighter to cause fire accident but still within the force-exerting capability for the adult user.

2. Description of the Prior Art

The simple-type lighter provides consumers with conveniency and low cost, and claims to be a great breakthrough in the contemporary era ever since the first use of fire in material civilization of human history. However, the lighter brings forth concerns on safety consideration. Particularly, the child playing with the lighter may result in fire accident. According to an old saying, a tiny spark may spread to become a prairie fire. Therefore, it cannot be too careful to use the lighter.

FIG. 1 is an exploded view of a simple-and-lever-type lighter structure of the prior art and FIG. 2 is a half sectional-view of the simple-and-lever-type lighter structure of the prior art. The structure of a conventional lighter as shown in FIG. 1 and FIG. 2 includes a main body (1), a wheel racket (2), a file wheel (3), a metal cap (4), and a lever (5). Among them, the main body (1) being a hollow body is for filling the liquid-gas for providing fuel to ignite the lighter. A sealing part (11) secured on top of the main body (1) furnishes a nozzle seat (12) having a plurality of row teeth (121) provided at the periphery thereof. The wheel racket (2) is slipped on the top of the corresponding sealing part (11) of the main body (1). Moreover, the wheel racket (2) having a securing seat (22) provided at the center thereof and having a pair of file-wheel seats (21) provided by extending from both sides and standing upright on opposite sides thereof is capable of containing a spring (32) and a flint (31). A securing hole (211) is provided on each of the file-wheel seats (21) near the top end thereof, and a securing hole (212) is also provided on each of the file-wheel seats (21) near the bottom end thereof. Furthermore, the wheel racket (2) also provides an adjusting ring (23) having a plurality of inner row teeth (231) on the inner surface that are capable of meshing with the outer row teeth (121) on the outer surface of the nozzle seat (12). The adjusting ring (24) is used for adjusting the quantity of liquid-gas output in the main body (1).

The lever (5) includes a pressing part (51), a base (52), and a slipping hole (53). Each side of the base (52) furnishes a salient part (521) used to be the pivot point C of the lever (5). The salient parts (521) are fitted in the securing holes (212) near the bottom of the file-wheel seats (21), and the securing holes (212) are used as pivot seat for bearing the salient parts (521). The slipping hole (53) being used as the point B of resisting force R (not shown in the Figure) passes through the nozzle (13) and slips on the neck part (131) of the nozzle (13) of the sealing part (11). The pressing part (51) provided at an end of the lever (5) is used to be the “point A” of exerting force P. Finally, the metal cap (4) is slipped on the top of the lighter to form the simple-type lighter that is most popular in the market nowadays.

As shown in FIG. 2, let x-x′ and y-y′ be the horizontal and vertical lines passing through the pivot point C while the vertical line crosses the rim of the file wheel (3) at a lowest and highest point of “L” and “V” respectively, and the inclined angle of the between the connecting line CE of the lever (5) is θ′ from the horizontal line x-x′, the elevation at the “point A” of exerting force P of the lever (5) is the same as that of the lowest point L, and the pivot point C is adjacent to the point L. Assuming that the height between the point of exerting force A and the point V is H′, when it comes to operating the lighter, the user, in order to use his/her thumb to press the pressing part (51) by exerting a force P at the “point A” of exerting force P on the lever (5) so as to pump the liquid-gas from the nozzle (13) of the main body (1) at the “point B” of resisting force R (not shown in the Figure), he/she uses his/her thumb to drive the file wheel (3) quickly from the point V making the file wheel (3) rub the flint (31) to generate spark and slides sequentially in counter-clockwise direction toward the “point A” of exerting force P at an end of the lever (5), the liquid-gas pumped out to meet the spark generated is ignited to generate flames.

The angle θ′ is an angle between the line CE that passes through the pivot point C and the “point A” of exerting force P and the line x-x′, and the angle θ₀ is an angle made between the line CE and the line y-y′. The simple-and-lever-type lighter structure of the prior art has a very small θ′ angle that make a relatively large θ₀ angle and a relatively higher height H=H′, as a consequence, the distance of the file wheel (3) rubbing the flint (31) is relatively large. This will make the user generate a relatively larger flames, thereby it is apt to cause fire accident when the children play around the lighter. This is the demerit of the prior art.

SUMMARY OF THE INVENTION

In light of the above-mentioned demerits of the prior art, the invention provides a dislocation-type safety lighter that aims to ameliorate at least some of the demerits of the prior art or to provide a useful alternative.

The primary objective of the invention is to provide a dislocation-type safety lighter making use of the fact that the height H of the “point A” of exerting force P relative to the pivot point C is relatively higher than that of the height H of the prior art. This will make a relatively larger angle θ′ and relatively smaller θ₀ to reduce the acting distance of the user's thumb to operate the lighter. This will make the user harder to exert force to ignite the lighter but the exerting force required is still within the capability of the user while makes the children harder to cause fire accident.

In order to achieve the above-mentioned objectives, the invention provides a dislocation-type safety lighter that includes a main body, a wheel racket, a file wheel, a metal cap, and a lever. The lever includes a pressing part, a base, and a slipping hole. Each side of the base furnishes a salient part used to be the pivot point C of the lever. The salient parts are fitted in the securing holes near the bottom of the file-wheel seats, and the securing holes are used as pivot seat for bearing the salient parts. The metal cap is capped on the top of the wheel racket to cover the file wheel and the lever. The height H between the elevation of of the “point A” of exerting force P and the elevation of the pivot point C is in the range (⅓)H′*H*(⅔)H′ where the height H′ is equal to the diameter of the file wheel (3). The larger the height H, the more laborious it is to turn the file wheel by the thumb of the user that makes the children whose exerting force is relatively weak harder to ignite the lighter. In this way, the lighter of the invention is capable of improving the efficacy of safety usage. Nevertheless, the exerting force P is still within the range of an adult user.

The accomplishment of this and other objectives of the invention will become apparent from the following description and its accompanying drawings of which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a simple-and-lever-type lighter structure of the prior art.

FIG. 2 is a half sectional-view of the simple-and-lever-type lighter structure of the prior art.

FIG. 3 is an exploded view of a dislocation-type safety lighter structure of the preferred embodiment of the invention.

FIG. 4 is a half sectional-view of the dislocation-type safety lighter structure of the first embodiment of the invention.

FIG. 5 is a half sectional-view of the dislocation-type safety lighter structure of the second embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 3 is an exploded view of a dislocation-type safety lighter structure of the preferred embodiment of the invention. As shown in FIG. 3, the dislocation-type safety lighter of the first embodiment of the invention includes a main body (1), a wheel racket (2), a file wheel (3), a metal cap (4), and a lever (5). Among them, the main body (1), wheel racket (2), the file wheel (3), the metal cap (4) are all pretty much similar to those of the simple-and-lever-type lighter structure of the prior art, thereby it is not necessary to repeat here.

The lever (5) includes a pressing part (51), a base (52), and a slipping hole (53). FIG. 4 is a half sectional-view of the dislocation-type safety lighter structure of the first embodiment of the invention and FIG. 5 is a half sectional-view of the dislocation-type safety lighter structure of the second embodiment of the invention. As shown in FIG. 4, and FIG. 5, a salient part (521) is furnished on both sides of the base (52) to assume as the pivot point C of the lever (5). The salient part (521) is fitted into the securing holes (212) at the lower portion of the file-wheel-seat (21), and the securing holes (212) are used for assuming as pivot bearing seat to bear the salient part (521). Assuming as the point of resistance force B of the lever (5), the slipping hole (53) is slipped on to the neck part (131) of the sealing part (11). What is more, the point A of the exerting force P exerting at the pressing part (51) at an end of the lever (5) is assumed as a “point A” of exerting force P.

Referring again to FIG. 4, in the first embodiment of the invention, on the pressing part (51), using the line x-x′ as the datum line for measuring heights, the height H of the “point A” of exerting force P is one third of the height H′ of the vertex point “V” of the diameter of the file wheel (3) measuring from the line x-x′, and the pivot point C is positioned adjacent to the bottom part of the vertical central line of the file wheel (3). For comparison, as shown in FIG. 2, when the height H₀=0 (not shown in the Figures), and if the tangential forces required for the user to use his/her thumbs to turn from the vertex point “V” of the file wheel (3) toward the “point A of the exerting force P” of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is F₀, and the torques and energy are M₀ and U₀ respectively, and the angles turned with respect to the pivot point C is ν₀. Moreover, as shown in FIG. 4, when the elevation of the “point A of the exerting force P” of the pressing part (51) kas a height H=H₁, and if the tangential forces required for the user to use his/her thumbs to turn from the vertex point “V” of the file wheel (3) toward the “point A of exerting force P” of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is F₁, and the torques and energy are M₁ and U₁ respectively, and the angles turned with respect to the pivot point C is ν₁.

As M₀=F₀ r; M₁=F₁ r′ and since U₀=M₀ ν₀; U₁=M₁ ν₁, we ends up with U₀=U₁ in accordance with law of conservation of energy, thereby M₀ ν₀=M₁ ν₁′ thus F₀ r ν₀=F₁ r ν₁; F₀ ν₀=F₁ ν₁; and F₁=(ν₀/ν₁)F₀=K₁ F₀ where K₁=ν₀/ν₁>1; therefore F₁>F₀.

In other word, as the height of the pressing part (51) of the lever (5) is raised from H₀ to H₁ the tangential force required for the user, by the use of his/her thumb, to turn from the vertex point V of the file wheel (3) toward the “point A” of exerting force P of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is increased from F₀ to F₁ and F₁ is K times of F₀ where K=ν₀/ν₁>1, the higher the height H is, the more laborious it is for the user to rub the flint (31) to generate spark, thereby the user is laborious rather than labor saving. Nevertheless, the exerting force (tangential force) F₁ is still within the capability of the exerting force of the user but out of the capability of the exerting force of the children. Therefore, the efficacy of using the safety lighter of the invention can be achieved.

Referring again to FIG. 5, similarly, in the second embodiment of the invention, on the pressing part (51), the height H′ of the “point A” of exerting force P is two third of the height H′ of the diameter of the file wheel (3) measuring from the tangent point at the lowest point L of the vertical central line of the file wheel (3), and the pivot point C is positioned adjacent to the bottom part of the vertical central line of the file wheel (3). For comparison, as shown in FIG. 2, when the height H₀=0 (not shown in the Figures), and if the tangential forces required for the user to use his/her thumbs to turn from the vertex point “V” of the file wheel (3) toward the “point A of the exerting force P” of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is F₀, and the torques and energy are M₀ and U₀ respectively, and the angles turned with respect to the pivot point C is ν₀. Moreover, as shown in FIG. 4, when the elevation of the “point A of the exerting force P” of the pressing part (51) kas a height H=H₁, and if the tangential forces required for the user to use his/her thumbs to turn from the vertex point “V” of the file wheel (3) toward the “ point A of exerting force P ” of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is F₂, and the torques and energy are M₂ and U₂ respectively, and the angles turned with respect to the pivot point C is ν₁.

As M₀=F₀ r; M₂=F₂ r′ and since U₀=M₀ ν₀; U₂=M₂ ν₂, we ends up with U₀=U₂ in accordance with law of conservation of energy, thereby M₀ ν₀=M₂ ν₂′ thus F₀ r ν₀=F₂ r ν₂; F₀ ν₀=F₂ ν₂; and F₂=(ν₀/ν₁), F₀=K₂ F₀ where K=ν₀/ν₂>1; therefore F₂>F₀.

In other word, as the height of the pressing part (51) of the lever (5) is raised from H₀ to H₁ the tangential force required for the user, by the use of his/her thumb, to turn from the vertex point V of the file wheel (3) toward the “point A” of exerting force P of the pressing part (51) in clockwise direction making the file wheel (3) capable of rubbing the flint (31) to generate spark is increased from F₀ to F₁ and F₁ is K times of F₀ where K=ν₀/ν₁>1, that is, the higher the height H is, the more laborious it is for the user to rub the flint (31) to generate spark, thereby the user is laborious rather than labor saving. Nevertheless, the exerting force (tangential force) F₁ is still within the capability of the exerting force of the user but out of the capability of the exerting force of the children. Therefore, the efficacy of using the safety lighter of the invention can be achieved.

Referring again to FIG. 4 and FIG. 5, using the line x-x′ as the datum line for measuring heights, the height H between the elevation of the “point A” of exerting force P and the point L is in the range (⅓)H′*H*(⅔)H′ where the height H′ is equal to the diameter of the file wheel (3). The larger the height H, the more laborious it is to turn the file wheel (3) by the thumb of the user that makes the children whose exerting force is relatively weak harder to ignite the lighter. In this way, the lighter of the invention is capable of improving the efficacy of safety usage. Nevertheless, the exerting force P is still within the range of an adult user.

It will become apparent to those people skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing description, it is intended that all the modifications and variation fall within the scope of the following appended claims and their equivalents. 

1. A dislocation-type safety lighter comprising: a main body; a wheel racket with a securing seat and coupled to the main body; a file wheel with a first height; a metal cap for capping the wheel racket; and the lever, and the lever further comprises a base with a first salient part and a second salient part; a pressing part with a second height, and the pressing part is coupled to the base and tilted upward; and a slipping hole; wherein the lever is positioned right above the wheel racket and pivots against the wheel racket with the first salient part and the second salient part, the securing seat protrudes through the base, the file wheel is positioned between the metal cap and the lever, the file wheel is coupled to the securing seat, and the second height is between ⅓ of the first height and ⅔ of the first height.
 2. The dislocation-type safety lighter as claimed in claim 1, wherein the first height is the file wheel's diameter, and the second height is ⅓ of the first height.
 3. The dislocation-type safety lighter as claimed in claim 1, wherein the first height is the file wheel's diameter, and the second height is ⅔ of the first height. 